mirror of
https://github.com/Candygoblen123/SwiftNES.git
synced 2024-09-18 16:41:01 -05:00
Render: implement basic chr rom renderer
This commit is contained in:
Andrew Glaze
parent
830bc5f65a
commit
bd12a61330
34
Sources/Render/Frame.swift
Normal file
34
Sources/Render/Frame.swift
Normal file
@ -0,0 +1,34 @@
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class Frame {
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var data: [UInt8] = [UInt8](repeating: 0, count: WIDTH * HEIGHT * 3)
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static let WIDTH = 256
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static let HEIGHT = 240
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func setPixel(_ loc: (x: Int, y: Int), _ color: (r: UInt8, g: UInt8, b: UInt8)) {
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let base = loc.y * 3 * Frame.WIDTH + loc.x * 3
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if base + 2 < data.count {
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data[base] = color.r
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data[base + 1] = color.g
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data[base + 2] = color.b
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}
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}
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}
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struct NESColor {
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static let SYSTEM_PALLETE: [(UInt8, UInt8, UInt8)] = [
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(0x80, 0x80, 0x80), (0x00, 0x3D, 0xA6), (0x00, 0x12, 0xB0), (0x44, 0x00, 0x96), (0xA1, 0x00, 0x5E),
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(0xC7, 0x00, 0x28), (0xBA, 0x06, 0x00), (0x8C, 0x17, 0x00), (0x5C, 0x2F, 0x00), (0x10, 0x45, 0x00),
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(0x05, 0x4A, 0x00), (0x00, 0x47, 0x2E), (0x00, 0x41, 0x66), (0x00, 0x00, 0x00), (0x05, 0x05, 0x05),
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(0x05, 0x05, 0x05), (0xC7, 0xC7, 0xC7), (0x00, 0x77, 0xFF), (0x21, 0x55, 0xFF), (0x82, 0x37, 0xFA),
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(0xEB, 0x2F, 0xB5), (0xFF, 0x29, 0x50), (0xFF, 0x22, 0x00), (0xD6, 0x32, 0x00), (0xC4, 0x62, 0x00),
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(0x35, 0x80, 0x00), (0x05, 0x8F, 0x00), (0x00, 0x8A, 0x55), (0x00, 0x99, 0xCC), (0x21, 0x21, 0x21),
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(0x09, 0x09, 0x09), (0x09, 0x09, 0x09), (0xFF, 0xFF, 0xFF), (0x0F, 0xD7, 0xFF), (0x69, 0xA2, 0xFF),
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(0xD4, 0x80, 0xFF), (0xFF, 0x45, 0xF3), (0xFF, 0x61, 0x8B), (0xFF, 0x88, 0x33), (0xFF, 0x9C, 0x12),
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(0xFA, 0xBC, 0x20), (0x9F, 0xE3, 0x0E), (0x2B, 0xF0, 0x35), (0x0C, 0xF0, 0xA4), (0x05, 0xFB, 0xFF),
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(0x5E, 0x5E, 0x5E), (0x0D, 0x0D, 0x0D), (0x0D, 0x0D, 0x0D), (0xFF, 0xFF, 0xFF), (0xA6, 0xFC, 0xFF),
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(0xB3, 0xEC, 0xFF), (0xDA, 0xAB, 0xEB), (0xFF, 0xA8, 0xF9), (0xFF, 0xAB, 0xB3), (0xFF, 0xD2, 0xB0),
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(0xFF, 0xEF, 0xA6), (0xFF, 0xF7, 0x9C), (0xD7, 0xE8, 0x95), (0xA6, 0xED, 0xAF), (0xA2, 0xF2, 0xDA),
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(0x99, 0xFF, 0xFC), (0xDD, 0xDD, 0xDD), (0x11, 0x11, 0x11), (0x11, 0x11, 0x11)
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]
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}
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80
Sources/Render/TileViewer.swift
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80
Sources/Render/TileViewer.swift
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@ -0,0 +1,80 @@
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struct TileViewer {
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static func showTile(chrRom: [UInt8], bank: Int, tileNum: Int) -> Frame {
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guard bank <= 1 else { fatalError("CHR Rom bank must be >1") }
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let frame = Frame()
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let bank = bank * 0x1000
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let tile = chrRom[(bank + tileNum * 16)...(bank + tileNum * 16 + 15)]
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for y in 0...7 {
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var upper = tile[tile.startIndex + y]
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var lower = tile[tile.startIndex + y + 8]
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for x in (0...7).reversed() {
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let value = (1 & upper) << 1 | (1 & lower)
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upper = upper >> 1
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lower = lower >> 1
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let rgb = switch value {
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case 0:
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NESColor.SYSTEM_PALLETE[0x01]
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case 1:
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NESColor.SYSTEM_PALLETE[0x23]
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case 2:
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NESColor.SYSTEM_PALLETE[0x28]
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case 3:
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NESColor.SYSTEM_PALLETE[0x31]
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default:
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fatalError("Invalid Pallete Color type")
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}
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frame.setPixel((x, y), rgb)
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}
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}
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return frame
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}
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static func showTileBank(chrRom: [UInt8], bank: Int) -> Frame {
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let frame = Frame()
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var tileY = 0
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var tileX = 0
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let bank = (bank * 0x1000)
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for tileNum in 0..<255 {
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if tileNum != 0 && tileNum % 20 == 0 {
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tileY += 10;
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tileX = 0;
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}
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let tile = chrRom[(bank + tileNum * 16)...(bank + tileNum * 16 + 15)]
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for y in 0...7 {
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var upper = tile[tile.startIndex + y]
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var lower = tile[tile.startIndex + y + 8]
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for x in (0...7).reversed() {
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let value = (1 & upper) << 1 | (1 & lower)
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upper = upper >> 1
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lower = lower >> 1
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let rgb = switch value {
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case 0:
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NESColor.SYSTEM_PALLETE[0x01]
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case 1:
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NESColor.SYSTEM_PALLETE[0x23]
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case 2:
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NESColor.SYSTEM_PALLETE[0x28]
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case 3:
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NESColor.SYSTEM_PALLETE[0x31]
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default:
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fatalError("Invalid Pallete Color type")
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}
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frame.setPixel((tileX + x, tileY + y), rgb)
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}
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}
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tileX += 10
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}
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return frame
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}
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}
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@ -9,41 +9,117 @@ guard SDL_Init(SDL_INIT_VIDEO) == 0 else {
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}
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let window = SDL_CreateWindow(
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"Snake Game",
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"SwiftNES",
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Int32(SDL_WINDOWPOS_CENTERED_MASK), Int32(SDL_WINDOWPOS_CENTERED_MASK),
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Int32(32.0 * 10.0), Int32(32.0 * 10.0),
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Int32(256.0 * 3.0), Int32(240.0 * 3.0),
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SDL_WINDOW_SHOWN.rawValue)
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let canvas = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC.rawValue)
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SDL_RenderSetScale(canvas, 10.0, 10.0)
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SDL_RenderSetScale(canvas, 3.0, 3.0)
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var texture = SDL_CreateTexture(canvas, SDL_PIXELFORMAT_RGB24.rawValue, Int32(SDL_TEXTUREACCESS_TARGET.rawValue), 32, 32)
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var texture = SDL_CreateTexture(canvas, SDL_PIXELFORMAT_RGB24.rawValue, Int32(SDL_TEXTUREACCESS_TARGET.rawValue), 256, 240)
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var event = SDL_Event()
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var quit = false
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func handleUserInput(_ cpu: CPU, event: inout SDL_Event) {
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// func handleUserInput(_ cpu: CPU, event: inout SDL_Event) {
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// while SDL_PollEvent(&event) > 0 {
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// if event.type == SDL_QUIT.rawValue {
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// SDL_DestroyWindow(window)
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// SDL_Quit()
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// exit(0)
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// }
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// if event.type == SDL_KEYDOWN.rawValue {
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// switch SDL_KeyCode(UInt32(event.key.keysym.sym)) {
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// case SDLK_ESCAPE:
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// SDL_DestroyWindow(window)
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// SDL_Quit()
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// exit(0)
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// case SDLK_w:
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// cpu.memWrite(0xff, data: 0x77)
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// case SDLK_a:
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// cpu.memWrite(0xff, data: 0x61)
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// case SDLK_s:
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// cpu.memWrite(0xff, data: 0x73)
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// case SDLK_d:
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// cpu.memWrite(0xff, data: 0x64)
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// default:
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// continue
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// }
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// }
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// }
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// }
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// func color(_ byte: UInt8) -> SDL_Color {
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// switch byte{
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// case 0:
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// return SDL_Color(r: 0, g: 0, b: 0, a: 255)
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// case 1:
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// return SDL_Color(r: 255, g: 255, b: 255, a: 255)
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// case 2, 9:
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// return SDL_Color(r: 128, g: 128, b: 128, a: 255)
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// case 3, 10:
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// return SDL_Color(r: 255, g: 0, b: 0, a: 255)
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// case 4, 11:
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// return SDL_Color(r: 0, g: 255, b: 0, a: 255)
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// case 5, 12:
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// return SDL_Color(r: 0, g: 0, b: 255, a: 255)
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// case 6, 13:
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// return SDL_Color(r: 255, g: 0, b: 255, a: 255)
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// case 7, 14:
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// return SDL_Color(r: 255, g: 255, b: 0, a: 255)
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// default:
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// return SDL_Color(r: 0, g: 255, b: 255, a: 255)
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// }
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// }
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// func readScreenState(_ cpu: CPU, frame: inout [UInt8]) -> Bool {
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// var frame_idx = 0
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// var update = false
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// for i in 0x0200..<0x600 {
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// let color_idx = cpu.memRead(UInt16(i))
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// let color = color(color_idx)
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// let (b1, b2, b3) = (color.r, color.b, color.g)
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// if frame[frame_idx] != b1 || frame[frame_idx + 1] != b2 || frame[frame_idx + 2] != b3 {
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// frame[frame_idx] = b1;
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// frame[frame_idx + 1] = b2;
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// frame[frame_idx + 2] = b3;
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// update = true;
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// }
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// frame_idx += 3
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// }
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// return update
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// }
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guard let bytes = NSData(contentsOfFile: "pacman.nes") else { fatalError("Rom not found") }
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var gameCode = [UInt8](repeating: 0, count: bytes.length)
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bytes.getBytes(&gameCode, length: bytes.length)
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let rom = try Rom(gameCode)
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//let tileFrame = TileViewer.showTile(chrRom: rom.character, bank: 1, tileNum: 0)
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let tileFrame = TileViewer.showTileBank(chrRom: rom.character, bank: 1)
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SDL_UpdateTexture(texture, nil, tileFrame.data, 256 * 3)
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SDL_RenderCopy(canvas, texture, nil, nil)
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SDL_RenderPresent(canvas)
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while true {
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while SDL_PollEvent(&event) > 0 {
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if event.type == SDL_QUIT.rawValue {
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SDL_DestroyWindow(window)
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SDL_Quit()
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exit(0)
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}
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SDL_DestroyWindow(window)
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SDL_Quit()
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exit(0)
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}
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if event.type == SDL_KEYDOWN.rawValue {
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switch SDL_KeyCode(UInt32(event.key.keysym.sym)) {
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case SDLK_ESCAPE:
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SDL_DestroyWindow(window)
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SDL_Quit()
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exit(0)
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case SDLK_w:
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cpu.memWrite(0xff, data: 0x77)
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case SDLK_a:
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cpu.memWrite(0xff, data: 0x61)
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case SDLK_s:
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cpu.memWrite(0xff, data: 0x73)
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case SDLK_d:
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cpu.memWrite(0xff, data: 0x64)
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default:
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continue
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}
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@ -51,79 +127,32 @@ func handleUserInput(_ cpu: CPU, event: inout SDL_Event) {
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}
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}
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func color(_ byte: UInt8) -> SDL_Color {
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switch byte{
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case 0:
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return SDL_Color(r: 0, g: 0, b: 0, a: 255)
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case 1:
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return SDL_Color(r: 255, g: 255, b: 255, a: 255)
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case 2, 9:
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return SDL_Color(r: 128, g: 128, b: 128, a: 255)
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case 3, 10:
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return SDL_Color(r: 255, g: 0, b: 0, a: 255)
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case 4, 11:
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return SDL_Color(r: 0, g: 255, b: 0, a: 255)
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case 5, 12:
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return SDL_Color(r: 0, g: 0, b: 255, a: 255)
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case 6, 13:
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return SDL_Color(r: 255, g: 0, b: 255, a: 255)
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case 7, 14:
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return SDL_Color(r: 255, g: 255, b: 0, a: 255)
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default:
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return SDL_Color(r: 0, g: 255, b: 255, a: 255)
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// let bus = Bus(try! Rom(gameCode))
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}
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}
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func readScreenState(_ cpu: CPU, frame: inout [UInt8]) -> Bool {
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var frame_idx = 0
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var update = false
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for i in 0x0200..<0x600 {
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let color_idx = cpu.memRead(UInt16(i))
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let color = color(color_idx)
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let (b1, b2, b3) = (color.r, color.b, color.g)
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if frame[frame_idx] != b1 || frame[frame_idx + 1] != b2 || frame[frame_idx + 2] != b3 {
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frame[frame_idx] = b1;
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frame[frame_idx + 1] = b2;
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frame[frame_idx + 2] = b3;
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update = true;
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}
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frame_idx += 3
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}
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return update
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}
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guard let rom = NSData(contentsOfFile: "snake.nes") else { fatalError("Rom not found") }
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var gameCode = [UInt8](repeating: 0, count: rom.length)
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rom.getBytes(&gameCode, length: rom.length)
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let bus = Bus(try! Rom(gameCode))
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var cpu = CPU(bus: bus)
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//var cpu = CPU(bus: bus)
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//cpu.load(gameCode)
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cpu.reset()
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//cpu.reset()
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//cpu.programCounter = 0xC000
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var screenState = [UInt8](repeating: 0, count: 32 * 3 * 32)
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var rng = SystemRandomNumberGenerator()
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cpu.run(onCycle: {
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//print(dumpCpuState(cpu))
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handleUserInput(cpu, event: &event)
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cpu.memWrite(0xfe, data: UInt8.random(in: 1...16, using: &rng))
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// var screenState = [UInt8](repeating: 0, count: 32 * 3 * 32)
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// var rng = SystemRandomNumberGenerator()
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// cpu.run(onCycle: {
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// //print(dumpCpuState(cpu))
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// handleUserInput(cpu, event: &event)
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// cpu.memWrite(0xfe, data: UInt8.random(in: 1...16, using: &rng))
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if readScreenState(cpu, frame: &screenState) {
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SDL_UpdateTexture(texture, nil, screenState, 32 * 3)
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SDL_RenderCopy(canvas, texture, nil, nil)
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SDL_RenderPresent(canvas)
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}
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// if readScreenState(cpu, frame: &screenState) {
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// SDL_UpdateTexture(texture, nil, screenState, 32 * 3)
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// SDL_RenderCopy(canvas, texture, nil, nil)
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// SDL_RenderPresent(canvas)
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// }
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usleep(70)
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}, onComplete: {
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SDL_DestroyWindow(window)
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SDL_Quit()
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exit(0)
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})
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// usleep(70)
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// }, onComplete: {
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// SDL_DestroyWindow(window)
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// SDL_Quit()
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// exit(0)
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// })
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// Infinite loop otherwise the program will exit prematurely
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RunLoop.main.run()
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// RunLoop.main.run()
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